Control device of EC fan

Abstract

The utility model relates to the technical field of EC fans, and discloses a control device of an EC fan, which comprises a plurality of fan bodies, a PLC (programmable logic controller) control electric box is arranged in front of the fan bodies, and a computer control box is arranged in front of the fan bodies. According to the control device of the EC draught fan, the PLC is connected with the draught fan bodies in series, control signals of 0-10 V can be transmitted, the rotating speed of the draught fan bodies can be adjusted, meanwhile, the signals are fed back to the computer control box, the working state of the draught fan bodies can be observed through the computer control box, dependence on an EC draught fan control import module is eliminated, and the working efficiency is improved. Meanwhile, the limitation of the number of fans of the FAN CONROL module is solved, after the heat dissipation assembly is used for a long time, a motor is started to drive a lead screw to rotate, the lead screw rotates to drive a brush in threaded connection to move along a sliding rod, bristles of the brush make contact with a filter plate to sweep off dust, the dust falls into a dust collection drawer, concentrated cleaning is facilitated, and the cleaning effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of EC fans, in particular to a control device for an EC fan. Background Art

[0002] In the ventilation systems of office buildings, commercial centers, factories and other buildings, fans are usually needed to regulate air flow. EC fans use brushless DC motors, which are more efficient than traditional AC motors. This enables EC fans to provide a larger air volume at the same power. Its high efficiency, precision control and low noise make it an ideal choice for air circulation systems.

[0003] In the existing solutions, the control solutions for EC fans are generally implemented based on FAN CONTROL modules. Since FAN CONTROL modules are imported modules with high prices, the application cost of the corresponding control solutions is high. At the same time, when EC fans are controlled based on FANCONTROL modules, the number of fans that can be controlled is limited. Generally, one control mechanism can control up to 31 fans, which cannot meet actual needs. If the number of fans needs to be increased, the corresponding FAN CONTROL modules need to be added at the same time, which further increases the cost of use.

[0004] Furthermore, the existing control box formed based on the FAN CONTROL module still has certain reliability problems in actual application, such as poor internal heat dissipation performance, which affects the service life and performance of related control modules; when installed outdoors, the overall installation position is low and it is easy to get water in. Summary of the invention

[0005] In view of the problems existing in the prior art of controlling EC fans based on FAN CONTROL modules, the purpose of the utility model is to provide a new control device for EC fans, which is constructed based on PLC and can effectively overcome the problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the control device of the EC fan provided by the utility model includes a fan body, a PLC control electric box and a computer control box, wherein the fan body is provided with multiple ones, the lower end of the fan body is fixedly connected to the greenhouse, the PLC control electric box is connected to the fan body and is connected to the computer control box; the lower end of the PLC control electric box is fixedly connected to the base, the front end of the PLC control electric box is provided with a cover door, the front end of the cover door is provided with an observation window, the rear end of the PLC control electric box is fixedly connected to the heat sink, the two sides of the PLC control electric box are fixedly connected to the heat dissipation assembly, the interior of the PLC control electric box is provided with a mounting plate, and the front end of the mounting plate is fixedly connected to the PLC controller.

[0007] Preferably, a plurality of the fan bodies are connected in series and electrically connected to the PLC controller.

[0008] Through the above technical solution, a PLC controller is set up. The PLC controller connects multiple fan bodies in series and transmits a 0-10V control signal to adjust the speed of the fan body. At the same time, the signal is fed back to the computer control box. The working status of the fan body can be observed through the computer control box, getting rid of the dependence on the imported EC fan control module, and solving the limitation of the number of fans carried by the FANCONTROL module (one control box can carry up to 31 fans).

[0009] Preferably, the cover door is rotatably connected to the PLC control electric box via a hinge, and the observation window is made of ultra-white transparent glass.

[0010] Through the above technical solution, an observation window is provided to observe the internal condition of the PLC control box. A base is provided at the lower end of the PLC control box to lift the PLC control box to prevent water on the ground from invading the interior of the PLC control box, thereby improving the waterproof performance of the PLC control box.

[0011] Preferably, the heat sink is fixedly connected to the rear end of the mounting plate, and the heat sink is made of pure copper.

[0012] Through the above technical solution, a heat sink is provided, and the heat from the mounting plate and the PLC controller is transferred to the heat sink. The heat sink exchanges heat with the air to improve the heat dissipation efficiency. The pure copper heat sink has a good heat dissipation effect.

[0013] Preferably, two identical heat dissipation components are provided, and the two heat dissipation components are symmetrically arranged on both sides of the PLC control box.

[0014] Furthermore, the heat dissipation assembly includes a box body, a filter plate, a motor, a screw rod, a sliding rod, a brush, a sealing plate, a fan, a lower hanging box and a dust drawer. The rear end of the box body is fixedly connected to the filter plate, the upper end of the box body is fixedly connected to the motor, the interior of the box body is rotatably connected to the screw rod, the interior of the box body is fixedly connected to the sliding rod, the interior of the box body is provided with a brush, the front end of the box body is provided with a sealing plate, the front end of the box body is fixedly connected to the fan, the lower end of the box body is fixedly connected to the lower hanging box, and the interior of the lower hanging box is provided with a dust drawer.

[0015] Through the above technical solution, two heat dissipation components are set up, and the two heat dissipation components cooperate with each other. The fans of the two heat dissipation components are started to extract and supply air respectively, forming an air duct to increase the air flow rate inside the PLC control box and avoid overheating inside the PLC control box.

[0016] Preferably, the upper end of the screw rod is fixedly connected to the output end of the motor, the screw rod is threadedly connected to the brush, and the brush is slidably connected to the sliding rod.

[0017] Through the above technical solution, a filter plate is provided, which effectively isolates dust in the air and has a certain dust-proof effect.

[0018] Preferably, the bristles of the brush are in contact with the filter plate, a square groove is provided at the lower end of the box body and is communicated with the lower hanging box, and the dust collecting drawer is slidably connected with the lower hanging box.

[0019] Through the above technical scheme, a brush is provided. After the heat dissipation component is used for a long time, dust is easily adhered to the surface of the filter plate. The starting motor drives the screw rod to rotate. The rotation of the screw rod drives the threaded brush to move along the sliding rod. The bristles of the brush contact the filter plate to sweep the dust off. The dust falls into the dust collection drawer, which is convenient for centralized cleaning and has a good cleaning effect.

[0020] The control device of the EC fan provided by the utility model is provided with a PLC controller. The PLC controller connects multiple fan bodies in series, transmits a 0-10V control signal, can adjust the rotation speed of the fan body, and feeds back the signal to a computer control box. The working status of the fan body can be observed through the computer control box, and the dependence on the imported EC fan control module is eliminated. At the same time, the limitation of the number of fans carried by the FAN CONTROL module (one control box can carry a maximum of 31 fans) is solved. An observation window is provided to observe the internal condition of the PLC control box. A base is provided at the lower end of the PLC control box to lift the PLC control box to prevent ground water from invading the interior of the PLC control box, thereby improving the waterproof performance of the PLC control box.

[0021] The control device of the EC fan provided by the utility model is provided with a heat sink, and the heat of the mounting plate and the PLC controller is conducted to the heat sink, and the heat sink and the air are heat exchanged to improve the heat dissipation efficiency. The pure copper heat sink has a good heat dissipation effect, and two heat dissipation components are provided. The two heat dissipation components cooperate with each other, and the fans of the two heat dissipation components are started to extract and supply air respectively, so as to form an air duct to increase the air flow rate inside the PLC control electric box and avoid overheating inside the PLC control electric box. A filter plate is provided, and the filter plate effectively isolates dust in the air and has a certain dust-proof effect. A brush is provided. After the heat dissipation component is used for a long time, dust is easily adhered to the surface of the filter plate, and the motor is started to drive the screw rod to rotate. The rotation of the screw rod drives the threaded brush to move along the sliding rod, and the bristles of the brush contact the filter plate to sweep the dust off, and the dust falls into the dust collection drawer, which is convenient for centralized cleaning and has a good cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 2 This is an enlarged structural diagram of the fan body and PLC control electric box of the utility model;

[0024] Figure 3 This is a schematic diagram of the enlarged structure of the PLC control electric box of the utility model Figure 1 ;

[0025] Figure 4 This is a schematic diagram of the enlarged structure of the PLC control electric box of the utility model Figure 2 ;

[0026] Figure 5 This is a schematic diagram of the disassembled structure of the PLC control electric box and heat dissipation components of the utility model.

[0027] Among them: 1. Fan body; 2. PLC control box; 3. Computer control box; 4. Greenhouse; 5. Base; 6. Cover door; 7. Observation window; 8. Heat sink; 9. Heat dissipation component; 901. Box body; 902. Filter plate; 903. Motor; 904. Screw rod; 905. Sliding rod; 906. Brush; 907. Cover plate; 908. Fan; 909. Lower hanging box; 910. Dust collection drawer; 10. Installation plate; 11. PLC controller. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Embodiment 1:

[0030] like Figure 1-2 As shown, the control device of the EC fan given in this example specifically includes a fan body 1, and a plurality of fan bodies 1 are provided. The number of fan bodies 1 is not limited to that shown in the figure, and is generally 32 or more. The plurality of fan bodies 1 are provided on the corresponding greenhouse 4, such as each fan body 1 is fixedly connected to the greenhouse 4 through its lower end.

[0031] Furthermore, in this example, corresponding PLC control boxes 2 and computer control boxes 3 are provided at the installation site of the plurality of fan bodies 1 , wherein the PLC control box 2 is connected to the plurality of fan bodies 1 and is connected to the computer control box 3 .

[0032] The PLC control box 2 provided here is used to control the working status of several fan bodies 1, and the computer control box 3 is connected to the PLC control box 2 and is used to store the operation data of the PLC control box 2. The PLC control box 2 is used to simultaneously control several fan bodies 1 to replace the FAN CONTROL module, effectively overcoming the problem of limited number of controlled dry fan bodies and also effectively reducing costs.

[0033] The specific structure of the computer control box 3 is not limited here, and can be determined according to actual needs. For example, it can be composed of corresponding waterproof PC. The specific structure scheme is a conventional technology in this field and will not be described here.

[0034] See also Figure 3 and Figure 4 In this example, the lower end of the box of the corresponding PLC control electric box 2 is specifically fixedly connected to the base 5, and the front end of the box of the PLC control electric box 2 is provided with a cover door 6, and the front end of the cover door 6 is provided with an observation window 7. Further, in this example, the rear end of the box of the PLC control electric box 2 is fixedly connected to the heat sink 8, and the two sides of the PLC control electric box 2 are fixedly connected to the heat dissipation component 9; the interior of the box of the PLC control electric box 2 is provided with a mounting plate 10, and the front end of the mounting plate 10 is fixedly connected to the PLC controller 11.

[0035] Specifically, in this example, the cover door 6 is rotatably connected to the box body of the PLC control box 2 by a hinge, and the observation window 7 is made of ultra-white transparent glass. By providing the observation window 7, the internal condition of the PLC control box 2 can be observed. The lower end of the PLC control box 2 is provided with a base 5, which lifts the PLC control box 2 to prevent ground water from invading the interior of the PLC control box 2, thereby improving the waterproof performance of the PLC control box 2.

[0036] Specifically, in this example, the heat sink 8 is fixedly connected to the rear end of the mounting plate 10, and the heat sink 8 is made of pure copper. By arranging the heat sink 8 on the box body, the heat of the mounting plate 10 and the PLC controller 11 can be transferred to the heat sink 8, and the heat sink 8 exchanges heat with the air to improve the heat dissipation efficiency. The pure copper heat sink 8 has a good heat dissipation effect.

[0037] For details, see Figure 5 In this example, the heat dissipation component 9 arranged on the PLC control box 2 specifically includes a box body 901, a filter plate 902, a motor 903, a screw rod 904, a slide rod 905, a brush 906, a sealing plate 907, a fan 908, a lower hanging box 909 and a dust collection drawer 910.

[0038] Among them, the rear end of the box body 901 is fixedly connected to the filter plate 902, the upper end of the box body 901 is fixedly connected to the motor 903, the inside of the box body 901 is rotatably connected to the screw rod 904, the inside of the box body 901 is fixedly connected to the slide rod 905, the inside of the box body 901 is provided with a brush 906, the front end of the box body 901 is provided with a sealing plate 907, the front end of the box body 901 is fixedly connected to the fan 908, the lower end of the box body 901 is fixedly connected to the lower hanging box 909, and the inside of the lower hanging box 909 is provided with a dust collection drawer 910.

[0039] In the preferred solution of this example, multiple fan bodies 1 are connected in series and connected to the PLC controller 11 in the PLC control box 2. The PLC controller 11 is electrically connected to the multiple fan bodies 1, and the computer control box 3 is electrically connected to the PLC controller 11. Here, by setting the PLC controller 11, the PLC controller 11 controls the multiple fan bodies 1 connected in series, and can transmit a 0-10V control signal accordingly to adjust the working state of the corresponding fan body 1, and at the same time feed back the signal to the computer control box 3, so that the working state of the fan body 1 can be observed through the computer control box 3, getting rid of the dependence on the imported EC fan control module, and solving the limitation of the number of fans carried by the FAN CONTROL module (one control box can carry up to 31 fans).

[0040] The specific structure of the PLC controller 11 is not limited here and can be determined according to actual needs.

[0041] Embodiment 2:

[0042] This example further provides a priority solution based on the solution in embodiment 1.

[0043] Combination Figures 2 to 5 As shown, in this example, two identical heat dissipation components 9 are provided, and the two heat dissipation components 9 are symmetrically arranged on both sides of the PLC control electric box 2. By providing two heat dissipation components 9, the two heat dissipation components 9 cooperate with each other, and the fans 908 of the two heat dissipation components 9 are started to extract and supply air respectively, forming an air duct to increase the air flow rate inside the PLC control electric box 2, thereby preventing the internal overheating of the PLC control electric box 2.

[0044] Furthermore, in this example, with respect to the heat dissipation assembly 9, the upper end of the screw rod 904 is fixedly connected to the output end of the motor 903, the screw rod 904 is threadedly connected to the brush 906, and the brush 906 is slidably connected to the slide bar 905. At the same time, the bristles of the brush 906 are in contact with the filter plate 902, the lower end of the box body 901 is provided with a square groove which is connected to the lower hanging box 909, and the dust collection drawer 910 is slidably connected to the lower hanging box 909.

[0045] Through such an arrangement, dust is easily adhered to the surface of the filter plate 902 after the heat dissipation component 9 has been used for a long time. The starting motor 903 drives the screw rod 904 to rotate. The rotation of the screw rod 904 drives the threaded brush 906 to move along the sliding rod 905. The bristles of the brush 906 contact the filter plate 902 to sweep away the dust, and the dust falls into the dust collection drawer 910, which is convenient for centralized cleaning and has a better cleaning effect.

[0046] In order to further illustrate the control device configuration scheme of the EC fan provided by the present invention, the operation process thereof is described below by way of example.

[0047] When the control device of the EC fan is in use, the PLC controller 11 controls multiple fan bodies 1 connected in series, transmits a 0-10V control signal, can adjust the rotation speed of the fan body 1, and feeds back the signal to the computer control box 3. The working status of the fan body 1 can be observed through the computer control box 3, getting rid of the dependence on the imported EC fan control module, and solving the limitation of the number of fans carried by the FAN CONTROL module (one control box can carry up to 31 fans).

[0048] At the same time, during use, the heat of the mounting plate 10 and the PLC controller 11 is conducted to the heat sink 8, and the heat sink 8 exchanges heat with the air to improve the heat dissipation efficiency. The two heat dissipation components 9 cooperate with each other, and the fans 908 of the two heat dissipation components 9 are started to extract and supply air respectively, forming an air duct to increase the air flow rate inside the PLC control box 2 to avoid overheating inside the PLC control box 2. The filter plate 902 effectively isolates the dust in the air and has a certain dust-proof effect. After the heat dissipation component 9 is used for a long time, dust is easily attached to the surface of the filter plate 902. The motor 903 is started to drive the screw rod 904 to rotate. The rotation of the screw rod 904 drives the threaded brush 906 to move along the slide rod 905. The bristles of the brush 906 contact the filter plate 902 to sweep the dust off, and the dust falls into the dust collection drawer 910, which is convenient for centralized cleaning and has a good cleaning effect.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control device for an EC fan, comprising a fan body (1), characterized in that: It also includes a PLC control box (2) and a computer control box (3), wherein the fan body (1) is provided with a plurality of them, the lower end of the fan body (1) is fixedly connected to the greenhouse (4), the PLC control box (2) is connected to the fan body (1), and is connected to the computer control box (3); the lower end of the PLC control box (2) is fixedly connected to a base (5), the front end of the PLC control box (2) is provided with a cover door (6), the front end of the cover door (6) is provided with an observation window (7), the rear end of the PLC control box (2) is fixedly connected to a heat sink (8), the two sides of the PLC control box (2) are fixedly connected to a heat sink assembly (9), the interior of the PLC control box (2) is provided with a mounting plate (10), and the front end of the mounting plate (10) is fixedly connected to a PLC controller (11).

2. The control device of an EC fan according to claim 1, characterized in that: The multiple fan bodies (1) are connected in series and are electrically connected to the PLC controller (11).

3. The control device of an EC fan according to claim 1, characterized in that: The cover door (6) is rotatably connected to the PLC control electric box (2) via a hinge, and the observation window (7) is made of ultra-white transparent glass.

4. The control device of an EC fan according to claim 1, characterized in that: The heat dissipation assembly (9) comprises a box body (901), a filter plate (902), a motor (903), a screw rod (904), a slide rod (905), a brush (906), a sealing plate (907), a fan (908), a lower hanging box (909) and a dust collection drawer (910). The rear end of the box body (901) is fixedly connected to the filter plate (902), the upper end of the box body (901) is fixedly connected to the motor (903), and the interior of the box body (901) is The connecting screw rod (904) is rotated, and the interior of the box body (901) is fixedly connected to the sliding rod (905), the interior of the box body (901) is provided with a brush (906), the front end of the box body (901) is provided with a sealing plate (907), the front end of the box body (901) is fixedly connected to the fan (908), the lower end of the box body (901) is fixedly connected to the lower hanging box (909), and the interior of the lower hanging box (909) is provided with a dust collection drawer (910).

5. The control device of an EC fan according to claim 4, characterized in that: The heat sink (8) is fixedly connected to the rear end of the sealing plate (907), and the heat sink (8) is made of pure copper.

6. A control device for an EC fan according to claim 1 or 4, characterized in that: Two identical heat dissipation components (9) are provided, and the two heat dissipation components (9) are symmetrically arranged on both sides of the PLC control electric box (2).

7. The control device of an EC blower according to claim 4, characterized in that: The upper end of the screw rod (904) is fixedly connected to the output end of the motor (903), the screw rod (904) is threadedly connected to the brush (906), and the brush (906) is slidably connected to the sliding rod (905).

8. A control device for an EC fan according to claim 4 or 7, characterized in that: The bristles of the brush (906) are in contact with the filter plate (902), a square groove is provided at the lower end of the box body (901) and is in communication with the lower hanging box (909), and the dust collecting drawer (910) is slidably connected to the lower hanging box (909).

Images